Specifications: 1) Operating distance: 50-150 meters 2) Mini size: 5.5cm x 4.5cm x 1.0cm 3) One receiver can work with 400 codes 4) No interference with other remotes and receivers 5) DIP switch selector: 8 DIP switches allow different combinations for different remotes Power Input Selector: This receiver works with AC/DC 9V–30V. It is recommended to adjust the power input selector according to the voltage. If the input voltage is above 24V, short pin 2; if below 24V, short pins 1 and 2. Color: White + Black Material: ABS Programming a new remote: 1) Select the remote brand by setting the DIP switches UP or DOWN. For example, for 433.92MHz remote controls, set DIP switch 7 to UP. 2) Press the learn button. The LED will turn on. 3) Press the button on the remote. The LED will flash 4 times, indicating successful programming. 4) Repeat for additional buttons. 5) The second channel programming procedure is the same. Erase all data: Press and hold the learn button. The LED will flash and then turn off after a few seconds. All stored data will be permanently erased and cannot be recovered. Compatibility: Works with all 433.92MHz fixed code remotes Package Contents: 1 x Receiver 3 x Remote Control Note: Light reflection and display differences may cause slight color variations between the image and the actual item. Measurement tolerance: +/- 1-3cm.